IPD sale XeMODeX - Experts in Volvo Electronics
Did you know? 🤔
Logged in users can get email notification of topic replies Log in or register (free).
Amazon Link Buy your stuff using this and it helps MVS!

What is this valve near air filter box connects to intake? Brake booster switch 30645493 Topic is solved

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo's stylish, distinctive "P2" platform cars.

2001 - 2007 V70
2004 - 2007 V70 R
2001 - 2007 XC-70
2001 - 2009 S60
2003 - 2007 S60 R

rjj100
Posts: 25
Joined: Thu Oct 24, 2019 9:54 pm
Year and Model: 2007 S60 2.5T
Location: Denver
Has thanked: 4 times
Been thanked: 0
United States of America
rjj100

What is this valve near air filter box connects to intake? Brake booster switch 30645493

Post by rjj100 » Fri Nov 22, 2019 9:21 am

B6F515BA-AAA0-45AC-A4AA-A0F2C86DE926.jpeg
I found this part broken on my recently acquired 2007 S60. It is a valve in front of the air filter box and has 3 hoses, some going to the intake manifold. I disconnected the electrical plug and cannot find a part number.

See center of the attached picture.
You do not have the required permissions to view the files attached to this post.



jimmy57
Posts: 6444
Joined: Fri Nov 12, 2010 9:25 am
Year and Model: 2004 V70R GT, et al
Location: Ponder Texas
Has thanked: 2 times
Been thanked: 197 times
jimmy57

Re: What is this valve near air filter box connects to intake?  Topic is solved

Post by jimmy57 » Fri Nov 22, 2019 9:25 am

electric vacuum pump switch. Provides vaccum for power brake booster when engine vacuum is too low (cold starts, especially at altitude).
The electric switch end looks to be broken off that one. The brown connector would go on a two wire switch.
These users thanked the author jimmy57 for the post:
rjj100



rjj100
Posts: 25
Joined: Thu Oct 24, 2019 9:54 pm
Year and Model: 2007 S60 2.5T
Location: Denver
Has thanked: 4 times
Been thanked: 0
United States of America
rjj100

Re: What is this valve near air filter box connects to intake?

Post by rjj100 » Fri Nov 22, 2019 9:42 am

Thank you! I can now search for a replacement part. I see a metal can lower down with hoses and electrical connections which I assume is the vacuum pump.

I have the electrical switch end in my pocket. It was broken off the valve and was wrapped around another hose down low with the wiring attached to the switch end, as if to hide it. Thats why I need a replacement.

I’ve driven it about 120 miles, and did not notice a lack of power brakes. It is cold here in Boulder, CO. (28 degrees now) and we are above 5,000 feet altitude.



User avatar
abscate
MVS Moderator
Posts: 19218
Joined: Sun Feb 17, 2013 5:54 pm
Year and Model: 99T5 ,99S70,2005V70
Location: NYC, ALBANY NY
Has thanked: 230 times
Been thanked: 763 times
Trinidad & Tobago
abscate

Re: What is this valve near air filter box connects to intake?

Post by abscate » Fri Nov 22, 2019 11:51 am

If you wait about 20 seconds from starting, your engine will come down off high idle, and you probably will never notice the lack of the vacuum pump.

jimmy will fix this if wrong, but my recollection is the intake CVVT gets massively advanced to give gobs of air in to reduce cold start emissions, the idle is elevated to keep it running, untll the excess start fuel is burned off

All that air makes manifold vacuum, and thus brake vacuum, in short supply.
These users thanked the author abscate for the post:
rjj100


Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW
Link to Maintenance record thread
Link To Volvo Glossary

jimmy57
Posts: 6444
Joined: Fri Nov 12, 2010 9:25 am
Year and Model: 2004 V70R GT, et al
Location: Ponder Texas
Has thanked: 2 times
Been thanked: 197 times
jimmy57

Re: What is this valve near air filter box connects to intake?

Post by jimmy57 » Fri Nov 22, 2019 11:54 am

The exhaust cam is advanced to allow still burning fuel to exit to warm catalyst and to eliminate the need for the previously used exhaust air injection pump.

I am a crank and go person so I could feel hard brakes at low altitude in cold weather when I started and selected a gear. The time when there is little vacuum is in the first minute when cam and ignition timing together with greater throttle opening are diminishing vacuum.

Jumper the two wire connector to see if the vacuum pump is OK.
These users thanked the author jimmy57 for the post:
rjj100



rjj100
Posts: 25
Joined: Thu Oct 24, 2019 9:54 pm
Year and Model: 2007 S60 2.5T
Location: Denver
Has thanked: 4 times
Been thanked: 0
United States of America
rjj100

Re: What is this valve near air filter box connects to intake?

Post by rjj100 » Fri Nov 22, 2019 1:03 pm

Abscate and Jimmy57,

I did as Jimmy suggested. I jumpered the connector and started the car. Then I listened to see if I could hear the pump running (heard nothing) and then felt the top of the vacuum pump to see if I could feel the pump running (felt nothing). I made connection and released connection several times in case my jumpers were not making contact but again, nothing.

I then looked in the fuse box to see if there was a vacuum pump fuse but didn’t see any. Is there a relay and fuse, and if so, where are they located?



User avatar
abscate
MVS Moderator
Posts: 19218
Joined: Sun Feb 17, 2013 5:54 pm
Year and Model: 99T5 ,99S70,2005V70
Location: NYC, ALBANY NY
Has thanked: 230 times
Been thanked: 763 times
Trinidad & Tobago
abscate

Re: What is this valve near air filter box connects to intake?

Post by abscate » Fri Nov 22, 2019 1:40 pm

It should be listed in the owner manual fuse listing, or on the wiring diagram (we don't host these here by agreement with Volvo)

I believe its common for the valve to fail and run the pump to death, so be aware of that possibility.


Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW
Link to Maintenance record thread
Link To Volvo Glossary

User avatar
RickHaleParker
Posts: 3214
Joined: Mon May 25, 2015 2:30 pm
Year and Model: See Signature below.
Location: Kansas
Has thanked: 3 times
Been thanked: 376 times
United States of America
RickHaleParker

Re: What is this valve near air filter box connects to intake?

Post by RickHaleParker » Fri Nov 22, 2019 2:49 pm

rjj100 wrote:
Fri Nov 22, 2019 1:03 pm
I then looked in the fuse box to see if there was a vacuum pump fuse but didn’t see any. Is there a relay and fuse, and if so, where are they located?
CEM Fuse #33 .... Under the dash.


Platform: P80 1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package, Plant: Uddevalla Sweden.

Platform: X40 (Nedcar) 2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000. Plant: Born Netherlands.

Platform P2 2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0,
Plant Torslanda Sweden.
----------------------------------------------------------------
1997 S90, B6304S, AW30-42, Bosch Motronic 4.4 - Sold

cn90
Posts: 6598
Joined: Wed Mar 31, 2010 9:54 am
Year and Model: 2004 V70 2.5T
Location: Omaha NE
Has thanked: 0
Been thanked: 113 times
United States of America
cn90

Re: What is this valve near air filter box connects to intake?

Post by cn90 » Sat Nov 23, 2019 8:05 am

As abscate said,

These 2 items (vacuum switch and vacuum pump) work together, and very often they die within short intervals of each other.
So, if the switch dies, the pump follows soon.


2004 V70 2.5T 100K+
2005 XC90 2.5T 110K+

rjj100
Posts: 25
Joined: Thu Oct 24, 2019 9:54 pm
Year and Model: 2007 S60 2.5T
Location: Denver
Has thanked: 4 times
Been thanked: 0
United States of America
rjj100

Re: What is this valve near air filter box connects to intake?

Post by rjj100 » Sat Nov 23, 2019 8:53 am

I believe the design of this brake boost vacuum could be better. If there is a leak in a hose, a failure in the brake booster, a failure of the vacuum operated electrical switch, the pump runs continuously and burns out. If I were to redesign this, i would limit 1) the % cycle time the pump runs during warm up (e.g. 5 seconds on 5 seconds off), the total time the pump runs after cold start (e.g. 5 minutes). and then throw a code if the system sees low vacuum and wants to run even more identifying a possible failure with the switch, hose, or brake booster. Protect the vacuum pump!



Post Reply
  • Similar Topics
    Replies
    Views
    Last post